Structure and working principle of the Mesh belt furnace

The ventilator is composed of a blower and a deflector plate. The blower motor is electrically interlocked with the heating element. Only when the blower is connected can the heating element be powered on, which ensures that the heating element can operate under the condition of ventilation circulation.

Furnace lining: The furnace body part of this furnace is made of all-fiber. The fibers are custom-made into modules according to the size of the furnace chamber. The fibers are compressed into blocks for on-site cotton construction. The fixation method adopts threading and hook nail fixation, that is, the fibers are evenly threaded in the block fiber cotton, and then the threading is hooked with hook nails, tightened and welded to the furnace body. The pressure-resistant part of the trolley is built with high alumina bricks, and the lower part is insulated with insulating bricks.

The lifting and lowering of the furnace door is achieved through rollers on the guide rail. It is achieved by rolling up and down and sealed with an advanced spring compression device. This not only ensures the fit and sealing between the furnace door fibers and the furnace body fibers when closing, but also guarantees that the fibers will not be damaged by friction during the opening and closing process. The power of the furnace door and the trolley is both provided by electric motors and has a controllable braking function.

The various moving mechanisms of the electric furnace adopt interlock control. That is, when the furnace door is opened, the power supply of the heating element is automatically cut off, and the power supply when the trolley is moving is restored at the same time. After the furnace door is closed, the power supply of the walking motor of the trolley is automatically cut off, and the power supply of the heating element is restored at the same time to prevent accidents caused by misoperation.

The heating elements are made by winding high-temperature resistance alloy wires into strip and spiral shapes, and are respectively hung on the furnace side and the wire support bricks of the trolley. They are fixed with high-alumina porcelain nails and wire support bricks to prevent them from coming out.

A cast steel furnace bottom plate with pressure resistance and high-temperature resistance is installed on the trolley for carrying workpieces. To prevent the oxide scale produced after the workpiece is heated from falling into the area around the heating element through the gap between the furnace bottom plate and causing damage to the heating element, the contact point between the furnace bottom plate and the furnace body adopts an insertable contact.

This furnace is temperature-controlled in multiple zones. The furnace temperature control system adopts an advanced intelligent temperature controller to achieve temperature rise and control inside the furnace chamber. This system is equipped with an advanced intelligent PID control algorithm and a five-digit large LCD display, featuring perfect self-tuning and self-adaptive functions. The control temperature and furnace temperature are displayed simultaneously. It can also program and control according to the process requirements of the workpiece, automatically adjust and control the heating power in the furnace chamber, and is easy to operate. The supporting control system also has functions such as sound and light over-temperature alarm. The power trigger of the temperature control system of this furnace adopts a three-phase three-wire contactless output module, which is matched with a bidirectional thyristor, ensuring precise and stable temperature control. This system is also equipped with a temperature recorder, which can accurately and promptly record the temperature of each furnace for inspection.